You can use Galaxy S9 recovery mode to flash new ROMs, clear Galaxy S9 cache partition, and to check recovery logs.
Although Galaxy S9 recovery mode was designed for some advanced users, you may need some of the features, especially clearing the cache partition to fix some problems after a major update.
This Galaxy S9 guide explains to you the functions of Galaxy S9 recovery mode, the way to reboot Galaxy S9 or S9+ into recovery mode, usage of the recovery mode, and methods of clearing Galaxy S9 cache partition.
What is Galaxy S9 recovery mode?
All Android phones have a special mode: recovery mode, which allows you to fix any Android problems and perform some actions (for example, patch the system) to the Android system without loading Android OS.
In the phone storage layout, there is a special partition for recovery. This partition is protected from Android OS and other partitions.
Galaxy S9 is not an exception.
If you think you never used Galaxy S9 recovery mode, you are very likely wrong.
When you install updates (including monthly security updates) for Galaxy S9 and S9+, you may notice the phone will reboot twice automatically.
During this updating process, Galaxy S9 or S9+ would reboot into Galaxy S9 recovery mode first to apply the update, then reboot into Android OS so that you can use Galaxy S9 and S9+.
Of course, Galaxy S9 recovery mode offers more functions including:
- To apply Android OS update
- To reset (factory data reset) Galaxy S9 or S9+.
- To wipe/clear Galaxy S9 cache partition.
- To boot into bootloader (download mode).
- To flash official or third-party ROMs for Galaxy S9 and S9+.
- To mount /system partition manually.
- To check recovery logs.
- To run graphics test.
Although Galaxy S9 recovery mode is seldom used for most Galaxy S9 and S9+ owners, you may need to reboot into Galaxy S9 recovery mode to fix some problem with your S9 or S9+.
In fact, most Galaxy S9 and S9+ owners reboot the phone into Galaxy S9 recovery mode to clear the cache partition to fix some issues after a major Android update.
How to reboot into Galaxy S9 recovery mode?
The key combination to reboot into Galaxy S9 recovery mode is Bixby button+ Volume up + Power. Please refer to Galaxy S9 layout page for the location of these buttons.
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